A few people asked about this code so here it is.
//Code written by Nigel Gibson - Use it with my blessing :-)
var now = new Date(); //Declares a variable called now. This is a date number 
  using the built in function Date()
  var hours = now.getHours(); //Use the built in method getHours to set the hour 
  variable to the hour number from now
  var minutes = now.getMinutes(); //Use the built in method getMinutes to set 
  the minute variable to the hour number from now
var dayname = new Array ("Sunday", "Monday", "Tuesday", 
  "Wednesday", "Thursday", "Friday", "Saturday"); 
  //declares an array called dayname - this array has 7 elements
  var monthname = new Array("January", "February", "March", 
  "April", "May", "June", "July", "August", 
  "September", "October", "November", "December"); 
  //declares and array called monthname
  hours += (((minutes < 10) ? ":0" : ":") + minutes) //Assembles 
  the hour and minute value into one lump. Inserts a leading 0 if the minute value 
  is less than 10
var thisday
  mydate = new Date()
  myday = mydate.getDay()
  mymonth = mydate.getMonth()
  myweekday= mydate.getDate()
  var myyear= mydate.getYear()
  thisday = dayname[myday] //sets thisday to the value of the element in the dayname 
  array accessed by the myday value. Thus if myday is 0 thisday is element 0 in 
  the array (Sunday). JavaScript uses zero based arrays so the first element is 
  at position zero.
  if (myyear<1900)
  myyear=myyear+1900 //Navigator reads the year number (getYear) from 1900 so 
  this adds 1900 if myyear is less than 1900. As IE reads getYear differently 
  it jumps this bit 
if((myweekday==1)||(myweekday==31)||(myweekday==21))
  var text ="st"
  else if((myweekday==2)||(myweekday==22))
  var text ="nd"
  else if((myweekday==3)||(myweekday==23))
  var text ="rd"
  else
  var text="th"
  //The next part writes the stuff out to the HTML page. You'll see that tags 
  are written as well as the variable values.
  document.write("<P ALIGN=center><FONT FACE=VERDANA,ARIAL title=Clock><hr 
  color=steelblue><b>" + hours + " - " + thisday +", 
  "+ monthname[mymonth]+" "); document.write(myweekday +""+ 
  text + ", "+ myyear + "</B><hr color=steelblue>");
Copy and paste this into the body of a web page or, save it as a JS script and call it as required.